Publication: IEICE TRANSACTIONS on Communications Publication Date: 2014/08/01 Vol. E97-BNo. 8pp. 1623-1629 Type of Manuscript: Special Section PAPER (Special Section on EU's FP7 ICT R&D Project Activities on Future Broadband Access Technologies in Conjunction with Main Topics of 2013 IEICE ICT Forum) Category: Keyword: 56Gb/s, EAM driver, low power, array, BiCMOS, optical duobinary coding,